PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

42409Heater,thermal Release

Cooper Industries Inc Cooper Distribution Equipment Div · NSN 5999-00-739-9621 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-00-739-9621 — this item is cataloged by the U.S. Government under National Stock Number 5999-00-739-9621. Primary manufacturer part number: 42409.
Features
  • Heater,thermal Release — FSC 5999
  • 1 verified cross-reference
  • Primary manufacturer: Cooper Industries Inc Cooper Distribution Equipment Div
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Heater,thermal Release, cataloged under National Stock Number 5999-00-739-9621, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Cooper Industries Inc Cooper Distribution Equipment Div. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Catalog Facts
Item NameHeater,thermal Release
FSC / FSG5999 — No Item Name Available (FSG 59)
ManufacturersCooper Industries Inc Cooper Distribution Equipment Div (CAGE 04009)
Technical Specifications
ParameterValue
NSN5999-00-739-9621
Primary Part Number42409
Item NameHeater,thermal Release
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerCooper Industries Inc Cooper Distribution Equipment Div
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeJ
Weight0.0300 lbs
Cube0.0020 cu ft
Verified Substitutes 4
5950-00-691-0270109B108-1 INTERCHANGEABLE
Reactor
Telephonics Corp
5962-01-088-948342409 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Div Rmd Strategic
5360-01-421-991142409 INTERCHANGEABLE
Spring,helical,extension
Tyco Fire Products Lp
1005-01-468-9684 INTERCHANGEABLE
Swab Holder Section,small Arms C
Cross-Reference Index
Part NumberManufacturer
42409 Cooper Industries Inc Cooper Distribution Equipment Div (USA)
Related Parts
5950-00-691-0270INTERCHANGEABLE
REACTOR
109B108-1
5962-01-088-9483INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
42409
5360-01-421-9911INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
42409
1005-01-468-9684INTERCHANGEABLE
SWAB HOLDER SECTION,SMALL ARMS C

Frequently Asked Questions

What is NSN 5999-00-739-9621?

NSN 5999-00-739-9621 is a Heater,thermal Release, manufactured by Cooper Industries Inc Cooper Distribution Equipment Div, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-00-739-9621?

NSN 5999-00-739-9621 has 1 cross-referenced part number: 42409 (Cooper Industries Inc Cooper Distribution Equipment Div).

What NSN replaces 5999-00-739-9621?

There are 4 known substitutes for 5999-00-739-9621: 5950-00-691-0270, 5962-01-088-9483, 5360-01-421-9911 and 1 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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